Panel Adjustment; Application Object; Notes; Adjustment Items - Sony PFM-42X1 Service Manual

2-3. Panel Adjustment

2-3-1. Application Object

This standard is applied to the PDP42X1##7# PDP
Module, which is manufactured by the manufacturing team
of PDP promotion department or elsewhere.

2-3-2. Notes

1) Without any special indication, the module should be
at the preliminary condition more than 10 minutes
before adjustment.
. Service signal : 100% Full White signal
. Service DC voltage : Vcc : 5 V, Va : 65 V, Vs : 190 V
. DC/DC Pack voltage : V1st : 115 V, Vscw : 110 V,
. Preliminary environment : Temperature (25 ± 5dC),
2) After assembling the module, perform aging under the
following conditions for stabilizing its operation before
starting the adjustment.
. Service signal : 100% Full White, Red, Green, Blue
pattern signals (Service time of each pattern : within
5 minutes/cycle)
. Service DC voltage : Match the voltage with the
setup voltage at the first adjustment.
. Aging period : 4 hours or more
. Aging environment : Temperature (60 ± 2dC),
relative humidity 75% or less
3) Module adjustment should be performed in the
following sequence.
. Set the initial voltage and adjust the voltage wave-
form of Vsetup.
. Measure the margin of the Vs voltage and determine
the voltage.
. Adjust and check the voltage of DC/DC pack (V1st,
Vsc, _Vy, _Vzb).
. Adjust the voltage waveform of Vset-down.
. Measure the margin of the Vset-up voltage and
determine the voltage.
. Adjust the waveform of the final voltage. The
adjustment value above may vary depending on
individual units.
4) Without any special indication, adjust the module
under the ambient temperature of 25 ± 5dC and the
relative humidity of 65 ± 10%.
c
If you leave the still image displayed for more than 10
minutes (especially the digital pattern or cross hatch
pattern, which has a clear gradation), afterimage may
remain in the black level part of screen.
PFM-42X1/42X1N
_Vy : _175 V, Vzb=105 V
relative humidity (65 ± 10%)

2-3-3. Adjustment Items

1. Adjusting the board group
1) Adjusting the voltage waveform of Vset-up
2) Adjusting the voltage waveform of Vset-down
3) Adjusting the voltage waveform of Vzb
2. Adjustment after assembling (PDP module
adjustment)
1) Set the initial voltage and adjust the voltage waveform
of Vsetup.
2) Measure the margin of Vs voltage and determine the
voltage.
3) Adjust and check the voltage of DC/DC pack (V1st,
Vsc, _Vy, _Vzb).
4) Adjust the voltage waveform of Vset-down.
5) Measure the margin of the Vset-up voltage and
determine the voltage.
6) Adjust the waveform of the final voltage.
2-3-4. Adjusting the Board Group (Applying
the Tools)
1. Required tools
1) Digital oscilloscope : 200 MHz or more
2) DVM (Digital Multimeter) : Fluke 87 or equivalent
3) Signal generator : VG-854 or equivalent
4) DC power supply
. DC power supply for Vs (1) : Should be changeable
more than 0-200 V/ more than 10 A.
. DC power supply for Va (1) : Should be changeable
more than 0-100 V/ more than 5 A.
. DC power supply for 5 V (1) : Should be changeable
more than 0-10 V/ more than 10 A.
. DC-DC converter tool (1) : The tool that can output
the voltage equivalent to that of the PDF42x1##7#
module by using the Vs, Va, or 5 V voltage.
. Voltage stability of the power supply : Within ± 1%
for Vs/Va, within ± 3% for 5 V
2. Connection diagram of the measuring
instrument and setting up the initial voltage
1) Connection diagram of measuring instrument
Refer to Fig. 1 (Connection diagram of measuring
instrument that adjusts the voltage waveform).
2) Setting up the initial voltage
Initial-setup voltage : Vcc : 5 V, Va : 65 V, Vs : 190 V
Adjust, the initial-setup voltage within the setup range
according to the module's characteristics.
2-3